.slider-arrow {
 position: absolute;
 display: block;
 margin-bottom: -20px;
 width: 40px;
 height: 40px;
 line-height: 40px;
 text-decoration: none;
 text-align: center;
 color: #fff;
 font-size: 2em;
 background-color: #333;
 background-color: rgba(50,50,50,.3);
 border-radius: 50%;}
.slider-arrow--right {
 bottom: 50%;
 right: 19.5%
;}

.slider-arrow--left {
 bottom: 50%;
 left: 19.5%
;}